seaweedfs/weed/filer/filerstore_translate_path.go
2020-12-21 23:37:43 -08:00

162 lines
4.7 KiB
Go

package filer
import (
"context"
"github.com/chrislusf/seaweedfs/weed/util"
"strings"
)
var (
_ = FilerStore(&FilerStorePathTranlator{})
)
type FilerStorePathTranlator struct {
actualStore FilerStore
storeRoot string
}
func NewFilerStorePathTranlator(storeRoot string, store FilerStore) *FilerStorePathTranlator {
if innerStore, ok := store.(*FilerStorePathTranlator); ok {
return innerStore
}
if !strings.HasSuffix(storeRoot, "/") {
storeRoot += "/"
}
return &FilerStorePathTranlator{
actualStore: store,
storeRoot: storeRoot,
}
}
func (t *FilerStorePathTranlator) translatePath(fp util.FullPath) (newPath util.FullPath){
newPath = fp
if t.storeRoot == "/" {
return
}
newPath = fp[len(t.storeRoot)-1:]
if newPath == "" {
newPath = "/"
}
return
}
func (t *FilerStorePathTranlator) changeEntryPath(entry *Entry) (previousPath util.FullPath){
previousPath = entry.FullPath
if t.storeRoot == "/" {
return
}
entry.FullPath = t.translatePath(previousPath)
return
}
func (t *FilerStorePathTranlator) recoverEntryPath(entry *Entry, previousPath util.FullPath) {
entry.FullPath = previousPath
}
func (t *FilerStorePathTranlator) GetName() string {
return t.actualStore.GetName()
}
func (t *FilerStorePathTranlator) Initialize(configuration util.Configuration, prefix string) error {
return t.actualStore.Initialize(configuration, prefix)
}
func (t *FilerStorePathTranlator) InsertEntry(ctx context.Context, entry *Entry) error {
previousPath := t.changeEntryPath(entry)
defer t.recoverEntryPath(entry, previousPath)
return t.actualStore.InsertEntry(ctx, entry)
}
func (t *FilerStorePathTranlator) UpdateEntry(ctx context.Context, entry *Entry) error {
previousPath := t.changeEntryPath(entry)
defer t.recoverEntryPath(entry, previousPath)
return t.actualStore.UpdateEntry(ctx, entry)
}
func (t *FilerStorePathTranlator) FindEntry(ctx context.Context, fp util.FullPath) (entry *Entry, err error) {
if t.storeRoot == "/" {
return t.actualStore.FindEntry(ctx, fp)
}
newFullPath := t.translatePath(fp)
entry, err = t.actualStore.FindEntry(ctx, newFullPath)
if err == nil {
entry.FullPath = fp[:len(t.storeRoot)-1] + entry.FullPath
}
return
}
func (t *FilerStorePathTranlator) DeleteEntry(ctx context.Context, fp util.FullPath) (err error) {
newFullPath := t.translatePath(fp)
return t.actualStore.DeleteEntry(ctx, newFullPath)
}
func (t *FilerStorePathTranlator) DeleteOneEntry(ctx context.Context, existingEntry *Entry) (err error) {
previousPath := t.changeEntryPath(existingEntry)
defer t.recoverEntryPath(existingEntry, previousPath)
return t.actualStore.DeleteEntry(ctx, existingEntry.FullPath)
}
func (t *FilerStorePathTranlator) DeleteFolderChildren(ctx context.Context, fp util.FullPath) (err error) {
newFullPath := t.translatePath(fp)
return t.actualStore.DeleteFolderChildren(ctx, newFullPath)
}
func (t *FilerStorePathTranlator) ListDirectoryEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int) ([]*Entry, error) {
newFullPath := t.translatePath(dirPath)
entries, err := t.actualStore.ListDirectoryEntries(ctx, newFullPath, startFileName, includeStartFile, limit)
if err != nil {
return nil, err
}
for _, entry := range entries {
entry.FullPath = dirPath[:len(t.storeRoot)-1] + entry.FullPath
}
return entries, err
}
func (t *FilerStorePathTranlator) ListDirectoryPrefixedEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int, prefix string) ([]*Entry, error) {
newFullPath := t.translatePath(dirPath)
entries, err := t.actualStore.ListDirectoryPrefixedEntries(ctx, newFullPath, startFileName, includeStartFile, limit, prefix)
if err != nil {
return nil, err
}
for _, entry := range entries {
entry.FullPath = dirPath[:len(t.storeRoot)-1] + entry.FullPath
}
return entries, nil
}
func (t *FilerStorePathTranlator) BeginTransaction(ctx context.Context) (context.Context, error) {
return t.actualStore.BeginTransaction(ctx)
}
func (t *FilerStorePathTranlator) CommitTransaction(ctx context.Context) error {
return t.actualStore.CommitTransaction(ctx)
}
func (t *FilerStorePathTranlator) RollbackTransaction(ctx context.Context) error {
return t.actualStore.RollbackTransaction(ctx)
}
func (t *FilerStorePathTranlator) Shutdown() {
t.actualStore.Shutdown()
}
func (t *FilerStorePathTranlator) KvPut(ctx context.Context, key []byte, value []byte) (err error) {
return t.actualStore.KvPut(ctx, key, value)
}
func (t *FilerStorePathTranlator) KvGet(ctx context.Context, key []byte) (value []byte, err error) {
return t.actualStore.KvGet(ctx, key)
}
func (t *FilerStorePathTranlator) KvDelete(ctx context.Context, key []byte) (err error) {
return t.actualStore.KvDelete(ctx, key)
}